Performed a test with the tech1...

[Roadster]

Finally after a few years, got my tech 1 out and hooked it up to the 94. There is a learning curve for sure. So it will take some time to understand all of the capabilities that can be performed.

I have the Master Cartridge which fortunately was updated by a PO. It covers the ECM from '81 through '96. So we are covered. I also have the correct adapter needed to attach to the OBD 1 ALDL in our vehicles.

Everything started just fine, ran a cold test first, then started the engine and ran a test as the engine was warming up. Total time for the test was 18 minutes, and that was because I was writing down the info as it appeared. Went out for a ride after, but did not have the tech 1 operating without a passenger to record the parameters while in motion.

It will ask you for the 8th digit of your VIN#, which is "J" and will then ask you if a 94 Corvette. Press "YES" and you are in.....
The Menu....
F0....DATA LIST
F1....FIELD SER
F2....DTC
F3....SNAPSHOT
F4....MISC TEST

Started with F0, these results are with the engine running.....

ENG SPEED
870-890......as engine warmed up......830-815 rpm's
DESIRED IDLE
850.............as engine warmed up......812-800 rpm's

Engine coolant reading is off by 2 degrees from the IP with the tech 1 giving a higher reading by that amount.

MAP (KPa,V)
39 1.50-1.54-1.56

FUEL EVAP PURGE
0%

THROTTLE POS
0.52 VOLTS increased as throttle was depressed slightly .62 VOLTS
THROTTLE ANGLE
0%................................................ .............................2%

LEFT H025 BNK 1
53 mV
LOOP STATUS
OPEN LOOP

RIGHT H025 BNK 2
44-53 mV

ST FUEL TR BNK 1
128
LT FUEL TR BNK 1
115

FUEL TRIM CELL
16 CELL
FUEL TRIM ENABLE
NO

SPARK ADVANCE
12 degrees MPH 0 km/h 0

KNOCK RETARD
0
KNOCK SIGNAL
NO

SYSTEM VOLTAGE
14.1 VOLTS
FUEL PUMP VOLTS
13.5 VOLTS
EGR DESIRED POS
0%
EGR ACTUAL POS
0%
EGR PINTLE POS
0.60 VOLTS
EGR DUTY CYCLE
0%

IDLE AIR CONTROL
22
ENGINE SPEED
678-700 RPM's

FAN 1
OFF
FAN 2
OFF
A/C FAN REQUEST
NO
A/C REQUEST
NO
A/C CLUTCH
OFF
AIR PUMP RELAY
OFF
AIR CONTROL
DIVERT

MPH
0
Km/h
0

1-4 SHIFT ACTIVE
NO
ENG OIL TEMP
153 degrees by tech 1........149 degrees by IP
SEC VAC (kPa, V)
0 0.58

POWER SWITCH
NORMAL.....w/key turned....FULL
SECONDARY SYSTEM
OFF
FEDS/PASSKEY
OK
SEC AIR INLT SOL
OFF

CALIBRATION ID 9011

ENGINE SPEED @200degrees
691 RPM's
DESIRED IDLE
662 RPM's

After totally warmed up received these readings.....

LEFT H025 BNK1
as low as 75 mv to as high as 735 mv
LOOP STATUS
CLOSED LOOP

FUEL TRIM CELL
16 CELL
FUEL TRIM ENABLE
YES

Went into some of the other menus, but there you can make adjustments, which I wasn't about to do, no need to do so.....
Don't fully understand everything, but at least I can access all of the info at anytime.